Which one of the following electrons in the ground state will have the least amount of energy?

Which of the following is the correct arrangement of 4d, 5p, 5f, and 6p orbitals in the order of decreasing energy?

The incorrect statement among the following is:

1.	Total orbital angular momentum of an electron in 's' orbital is equal to zero.
2.	An orbital is designated by three quantum numbers, while an electron in an atom is designated by four quantum numbers.
3.	The electronic configuration of N atom is
4.	The value of m for dz2 is zero.

What is the correct family and electronic configuration for element Z = 114?

1. Halogen family, [Rn]5f¹⁴6d¹⁰7s²7p⁵

2. Carbon family, [Rn]5f¹⁴6d¹⁰7s²7p²

3. Oxygen family, [Rn]5f¹⁴6d¹⁰7s²7p⁴

4. Nitrogen family, [Rn]5f¹⁴6d¹⁰7s²7p⁶

The element Z = 114 has been discovered recently. Family/group and electronic configuration from which it  will belong are:

1. Carbon family and  [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p²
2. Oxygen family and [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁴
3. Nitrogen family and [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶
4. Halogen family and [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁵

The electronic configurations of Eu (Atomic no. 63), Gd (Atomic no. 64) and Tb (Tb Atomic no. 65) are

1. [Xe]4f⁶5d¹6s², [Xe]4f⁷5d¹6s² and [Xe]4f⁹6s²

2. [Xe]4f⁶5d¹6s², [Xe]4f⁷5d¹6s² and [Xe]4f⁸5d¹6s²

3. [Xe]4f⁷6s², [Xe]4f⁷5d¹6s² and [Xe]4f⁹6s²

4. [Xe]4f⁷6s², [Xe]4f⁸6s² and [Xe]4f⁸5d¹6s² 

How many electrons can fit in the subshell for which n = 3 and l = 1?